Book/Report

FZJ-2018-04003

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Zerstörungsfreie Werkstoffprüfung hochwarmfester Legierungen mit Hilfe der Neutronenkleinwinkelstreuung (SANS)

Widera, T. (Corresponding author)FZJ* ; Krautwasser, P. ; Schuster, H.FZJ* ; Nickel, H.FZJ*

1992
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/19254

Report No.: Juel-2692

Abstract: The suitability of the Small Angle Neutron Scattering (SANS) technique for the measurement of micro structural parameters of high-temperature alloys has been studied. The aim was the non-destructive determination of the creep damage for the estimation of the residual lifetime of service loaded gas turbine blades. In the first step the quantitative correlation between the SANS Signal and the microstructure of the material has been investigated using two oxide dispersion stengthened (ODS) alloys of simple microstructure. The size distributions of the dispersoid in the as-received alloy and the thermally induced growth of the dispersoid have been measured. Good agreement with results of transmission electron microscopy examinations was found. Subsequently the relationship between the SANS signal and the strain of a typical, creep loaded, $\gamma$'-strengthened Ni-base superalloy has been investigated. In a series of creep specimens made from the cast superalloy IN 100, systematically increasing amounts of creep strain have been produced. With these specimens two parameters can be derived from the SANS scattering curve, each pair of values having a clear relationship with the creep strain. A hypothesis is discussed concerning the related scattering mechanism.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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